Examine source code of youtube-focus

{
  "manifest_version": 3,
  "name": "youtube-focus",
  "version": "1.0.1",
  "icons": {
    "48": "public/logo.png"
  },
  "action": {
    "default_icon": {
      "48": "public/logo.png"
    },
    "default_popup": "src/popup/index.html"
  },
  "content_scripts": [
    {
      "js": [
        "assets/main.ts-loader-CzjHOW7v.js"
      ],
      "matches": [
        "https://*/*"
      ]
    }
  ],
  "permissions": [
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "youtube-focus@pabloqiu18.github",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "web_accessible_resources": [
    {
      "matches": [
        "https://*/*"
      ],
      "resources": [
        "assets/settings-atscK0r1.js",
        "assets/main.ts-Bti8HRmz.js"
      ],
      "use_dynamic_url": false
    }
  ]
}